To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Have used the duo turbo 450 model for 8 years, only recently needed to replace it with this one. Tough and robust; great software and top print quality. Very fast. Used this whilst in corporate and it rarely let me down.